Geometry: Area of a Rectangle
This is a free lesson from our course in Geometry 
 
   
In this lesson, we will look at the formula used to calculate the area of a rectangle. You will learn it with the help of some examples and practice questions with solution, using video explanations by the instructor.
A rectangle is a four sided polygon, where opposite sides are parallel and congruent. The area of a rectangle can be obtained by multiplying the lengths of the two sides. If length of one side is l and the length of the other side is w, then the area of the rectangle is given by the formula: Area = l x w. For example, the area of a rectangular room of dimensions 10m and 20 m is 200 m2. (More text below video...)
<h2> Area of a Rectangle - Watch video (Geometry)</h2> <p> area, rectangle, geometry, video, area of rectangle, formula, calculate, opposite sides, equal, base, height, example, practice questions, quizzes</p> <p> If length of one side is l and the length of the other side is w, then the area of the rectangle is given by the formula: Area = l w.</p>
Other useful lessons:
Area of a Square
Area of a Triangle - Areas of Polygons and Circles
Area of a Rhombus
Area of a Parallelogram
Area of a Trapezoid
Area of a Circle
Effect of dimension changes on Area
Real World Applications - Area of Polygons and Circles
(Continued from above) The formula for finding the area of a rectangle can also be used to find the length of one side, if we know the area and the dimension of the other side.
                    length = Area/width.
                    width  = Area/length.
For example: if the area of the rectangle is 120 cm2 and the length is 12 cm, then width works out to 120/12 = 10 cm.
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